From 76b1fc12159112d0d85f55594e35dc7f4a021129 Mon Sep 17 00:00:00 2001
From: Christopher Roberts <Christopher.Roberts@AmWell.com>
Date: Sat, 13 Feb 2021 16:36:41 -0500
Subject: [PATCH] fix: Allow searching for tests in node_modules

---
 CHANGELOG.md                            | 1 +
 docs/Configuration.md                   | 2 ++
 packages/jest-config/src/ValidConfig.ts | 1 +
 packages/jest-haste-map/src/types.ts    | 1 +
 packages/jest-types/src/Config.ts       | 2 ++
 5 files changed, 7 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6dc8f3169adf..2012042ee4bf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -56,6 +56,7 @@
 - `[jest-worker]` Do not swallow errors during serialization ([#10984](https://github.com/facebook/jest/pull/10984))
 - `[pretty-format]` [**BREAKING**] Convert to ES Modules ([#10515](https://github.com/facebook/jest/pull/10515))
 - `[pretty-format]` Only call `hasAttribute` if it's a function ([#11000](https://github.com/facebook/jest/pull/11000))
+- `[jest-config]` Allow searching for tests in node_modules by exposing `retainAllFiles` ([#11084](https://github.com/facebook/jest/pull/11084))
 
 ### Chore & Maintenance
 
diff --git a/docs/Configuration.md b/docs/Configuration.md
index d0f895117465..0a9f6092b773 100644
--- a/docs/Configuration.md
+++ b/docs/Configuration.md
@@ -499,6 +499,8 @@ type HasteConfig = {
   platforms?: Array<string>;
   // Whether to throw on error on module collision.
   throwOnModuleCollision?: boolean;
+  // Whether to search for tests in node_modules.
+  retainAllFiles?: boolean;
 };
 ```
 
diff --git a/packages/jest-config/src/ValidConfig.ts b/packages/jest-config/src/ValidConfig.ts
index 2c7338301e07..294f8096e0b0 100644
--- a/packages/jest-config/src/ValidConfig.ts
+++ b/packages/jest-config/src/ValidConfig.ts
@@ -58,6 +58,7 @@ const initialOptions: Config.InitialOptions = {
     hasteImplModulePath: '<rootDir>/haste_impl.js',
     platforms: ['ios', 'android'],
     throwOnModuleCollision: false,
+    retainAllFiles: false
   },
   injectGlobals: true,
   json: false,
diff --git a/packages/jest-haste-map/src/types.ts b/packages/jest-haste-map/src/types.ts
index 61dee043c751..5d3fade4f2b1 100644
--- a/packages/jest-haste-map/src/types.ts
+++ b/packages/jest-haste-map/src/types.ts
@@ -19,6 +19,7 @@ export type WorkerMessage = {
   rootDir: string;
   filePath: string;
   hasteImplModulePath?: string;
+  retainAllFiles?: boolean;
 };
 
 export type WorkerMetadata = {
diff --git a/packages/jest-types/src/Config.ts b/packages/jest-types/src/Config.ts
index 8b8243994a0e..56af55b53737 100644
--- a/packages/jest-types/src/Config.ts
+++ b/packages/jest-types/src/Config.ts
@@ -28,6 +28,8 @@ export type HasteConfig = {
   platforms?: Array<string>;
   /** Whether to throw on error on module collision. */
   throwOnModuleCollision?: boolean;
+  /** Whether to search for tests in node_modules. */
+  retainAllFiles?: boolean;
 };
 
 export type CoverageReporterName = keyof ReportOptions;